Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '861393be36a5bb21f3faa3dfa48f8dedf5d8812e773b9796d8683651b76355bc' 
  AND token = 'epWrejPd1WsOtWdZUTkN3L85NrojfbgLF/KT2ZsqslI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}